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		<citationkey>ErickssonSouzCass:2018:SoAmMo</citationkey>
		<title>South America monsoon system and features simulated by the Eta regional model</title>
		<year>2018</year>
		<secondarytype>PRE CI</secondarytype>
		<author>Ericksson, Stefan,</author>
		<author>Souza, Vitor Moura Cardoso e Silva,</author>
		<author>Cassak, Paul,</author>
		<group></group>
		<group>DIDGE-CGCEA-INPE-MCTIC-GOV-BR</group>
		<affiliation>Laboratory for Atmospheric and Space Physics</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>West Virginia University</affiliation>
		<electronicmailaddress></electronicmailaddress>
		<electronicmailaddress>vitor.souza@inpe.br</electronicmailaddress>
		<conferencename>AGU Fall Meeting</conferencename>
		<conferencelocation>Washington, D. C.</conferencelocation>
		<date>10-14 dec.</date>
		<transferableflag>1</transferableflag>
		<contenttype>External Contribution</contenttype>
		<keywords>Tripolar BM perturbations across dayside magnetopause exhausts – comparing THEMIS multi-spacecraft observations and PIC simulations.</keywords>
		<abstract>THEMIS occasionally show evidence of tripolar perturbations of the out-of-plane (guide) magnetic field across reconnection exhausts at the dayside magnetopause. This type of guide field signature may indicate a presence of magnetic flux ropes that form between two active reconnection X-lines. We examined the 3-s cadence of THEMIS ion velocity distributions in the field parallel-perpendicular plane across these types of reconnection exhausts. The survey resulted in a clear evidence of two counter-streaming magnetosheath ion populations in at least 30% of tripolar events. The same type of bi-streaming ions were observed when THEMIS A,D,E confirmed a case of converging ion exhausts at the dayside magnetopause. A particle-in-cell (PIC) simulation for asymmetric magnetopause conditions confirm the presence of two counter-streaming ion populations within a magnetic island that formed between two X-lines. The time-dependent ion particle trajectories clearly show how the two ion populations originated in the upstream magnetosheath and reached the same region of two converging exhausts from the two adjacent reconnection X-lines.</abstract>
		<area>CEA</area>
		<language>en</language>
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